Material weather resistance testing for urban outdoor furniture requires specific environmental humidity conditions to accurately simulate real-world degradation. Standard testing protocols typically maintain relative humidity between 50-60% for baseline evaluations, though accelerated testing may employ higher humidity levels up to 90-95% to simulate extreme conditions. The humidity requirements vary depending on material composition: powder-coated metals generally undergo testing at 50±5% RH, while wood composites may require 65±5% RH to properly assess moisture absorption and dimensional stability. International standards including ASTM G154 and ISO 4892-3 specify precise humidity control during UV and condensation cycles, as improper humidity levels can lead to inaccurate predictions of material lifespan. Manufacturers must maintain ±3% humidity tolerance during testing to ensure reproducible results that accurately reflect how outdoor furniture will perform in various urban environments with different microclimates and humidity exposure patterns.
What are the environmental humidity requirements for the material weather resistance test of urban outdoor furniture?
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